ANTHOZOA. 
Gael. 11 
tinxa. The cnidoblasts have communication with both nerve and muscle 
fibrils ; those cells, on the other hand, which bear cilia are true support- 
ing cells, and have no direct communication with either nerve or muscle, 
but are continuous with the supporting lamella. 
21a. Lindstrom, D. Om de Palseozoiska Formationernas Operkel- 
barande Koraller. Sv. Ale. Handl., Bihang vii.,No. 4, 6 lithographic 
plates. Abstr. by H. N. Moseley in Nature, xxviii. p. 35, 6 figs. 
This paper contains a summary of all known forms. The author 
divides the group into (1) the Calceolidce , having the septa on the inner 
face of the operculum not alike, and a median septum the largest ; 
(2) the Araiopomantidce , with the septa on the operculum all alike, and no 
defined median septum. In successive Silurian strata, a series of three 
modifications of the form Goniophyllum pyraniidale are met with. 
22. . Silurische Korallen aus Nord Russland und Sibirien. Abstr. 
from Sv. Ak. Handl., Bihang vi., No 18, pi., by E. Kayser in JB. 
Mineral, 1883, p. 136. 
The genera Favosites and Heliolites are found most abundantly ; 
Columnopora , Iloughtonia , and Calapcecia occur together. 
23. Marshall, A. M. On the Polymorphism of the Alcyonaria. Rep. 
Brit. Ass. 1883, p. 529. Abstracts in J. R. Micr. Soc. (2) iii. 
pt. 6, p. 855, and Nature, xxix. p. 580. 
In Pennatula phosphorea, certain zooids along the ventral surface are 
much enlarged, and assume the form of conical spikes, which assume a 
length of a quarter of an inch. In Umbellula gracilis , there are zooids 
bearing one tentacle. 
24. . Report on the Pennatulida dredged by H.M.S. ‘ Triton.’ 
Tr. R. Soc. Edinb. xxxii. pp. 119-152, pis. xxi.-v. 
The most remarkable fact is the greafr number of forms dredged at 
a depth of 555 fath. The results do not lend support to Kolliker’s 
statement that the simpler forms of Pennatulids inhabit great depths. 
Umbellula is not a primitive, but a highly differentiated form. 
25. Nicholson, H. A. Contributions to Micro-Palaeontology. On 
Stenopora howsii, Nich., with notes on Monticulipora tumida , Phill., 
and remarks on Tabulipora urii, Young [39, infra]. Ann. N. H. (5) 
xii. pp. 285-297, pi. x., 3 woodcuts. 
Stenopora howsii is most nearly allied to S. tasmaniensis , but it is. also 
related to Monticulipora (?) tumida , Phill. Tabulipora urii , Young, is 
very similar to Stenopora howsii, differing only in the structure of its 
walls. 
26. Parfitt, E. On the Temperature and Coral Fauna of the Green- 
sand Sea. Tr. Devon. Ass. 1883, p. 416. 
27. Pratz, E. Eocene Korallen aus der Libyschen Wiiste und Aegypten. 
Palaeontogr. xxx. p. 220, pi. xxxv. 
23. Ridley, S. 0. Notes on the Zoophytes and Sponges obtained by 
Mr. F. Day off the East Coast of Scotland. J. L. S. xvii. p. 105. 
Very few Anthozoa were found ; Alcyonium, however, was abundant. 
1883. [VOL. XX.] D 3 
